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Synthesis, Photoluminescence Behavior of Green Light Emitting Tb(III) Complexes and Mechanistic Investigation of Energy Transfer Process

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Abstract

A series of five new terbium(III) ion complexes with 4,4-difluoro-1-phenylbutane-1,3-dione (HDPBD) and anciliary ligands was synthesized. The composition and properties of complexes were analyzed by elemental analysis, IR, NMR, powder X-ray diffaraction, TG-DTG and photoluminescence spectroscopy. These complexes exhibited ligand sensitized green emission at 546 nm associated with 5D4 → 7F5 transitions of terbium ion in the emission spectra. The photoluminescence study manifested that the organic ligands act as antenna and facilitate the absorbed energy to emitting levels of Tb(III) ion efficiently. The enhanced luminescence intensity and decay time of ternary C2-C5 complexes observed due to synergistic effect of anciliary ligands. The CIE color coordinates of complexes came under the green region of chromaticity diagram. The mechanistic investigation of intramolecular energy transfer in the complexes was discussed in detail. These terbium(III) complexes can be thrivingly used as one of the green component in light emitting material and in display devices.

Illustrate the sensitization process of the Tb ion and intramolecular energy transfer process in the Tb3+ complex.

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Acknowledgements

The present work has been supported by Council of Science and Industrial Research (CSIR) of India [09/382(0155)/2012- EMR-I (Manju Bala)].

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Authors and Affiliations

  1. Department of Chemistry, Maharshi Dayanand University, Rohtak, Haryana, 124001, India

    Manju Bala, Satish Kumar, Rekha Devi, V. B. Taxak, Priti Boora & S. P. Khatkar

  2. UIET, Maharshi Dayanand University, Rohtak, Haryana, 124001, India

    Avni Khatkar

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  1. Manju Bala
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  2. Satish Kumar
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Correspondence to S. P. Khatkar.

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Bala, M., Kumar, S., Devi, R. et al. Synthesis, Photoluminescence Behavior of Green Light Emitting Tb(III) Complexes and Mechanistic Investigation of Energy Transfer Process. J Fluoresc 28, 775–784 (2018). https://doi.org/10.1007/s10895-018-2239-y

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  • DOI: https://doi.org/10.1007/s10895-018-2239-y

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